Lenovo s820e cannot display instant messages.

If you mean that the phone can't read the SIM card, you can refer to the following suggestions:

Card slot 1. S820e supports 3G and 2G networks (GSM when roaming internationally), and card slot 2 supports mobile/Unicom 2G networks. It is recommended to check whether the SIM card corresponding to the card slot is available here.

2. Poor contact of 2.SIM card. It is suggested to turn off the mobile phone and try to plug and unplug the SIM card again to see if it can be used normally.

3. If the SIM card itself is abnormal or incompatible, it is recommended to use other SIM cards for comparison. If other SIM cards can be identified, it is recommended to contact the operator for card replacement or other operations;

4. The above operation can't confirm or improve the problem. It is recommended to back up the fuselage data and restore the factory settings, and try to observe.

If the problem cannot be effectively solved, it is not ruled out that it is caused by the failure of components such as the fuselage card slot or RF, and it is recommended to send it for repair and testing.